Xiaomi Redmi K40
- Screen: 6.67" AMOLED - 1080 x 2400
- SoC: Qualcomm Snapdragon 870 5G
- Camera: 3 (48 MP + 8 MP + 5 MP)
- Battery: 4520 mAh
- OS: Android 11
- Weight: 196 grams (6.91 oz)
Review
Scores marked with a red asterisk (*) are approximate, as we currently do not have sufficient test results to make a precise estimation.
Full specifications
Detailed specifications, tests, and benchmarks of the Xiaomi Redmi K40Display
| Type | AMOLED |
| Size | 6.67 inches |
| Resolution | 1080 x 2400 pixels |
| Aspect ratio | 20:9 |
| PPI | 395 ppi |
| Refresh rate | 120 Hz |
| Adaptive refresh rate | No |
| Max rated brightness | 500 nits |
| Max rated brightness in HDR | 1300 nits |
| HDR support | Yes, HDR10+ |
| Screen protection | Corning Gorilla Glass 5 |
| Screen-to-body ratio | 85.9% |
| Display features | - DCI-P3 - Always-On Display - DC Dimming |
Design and build
| Height | 163.7 mm (6.44 inches) |
| Width | 76.4 mm (3.01 inches) |
| Thickness | 7.8 mm (0.31 inches) |
| Weight | 196 g (6.91 oz) |
| Waterproof | IP53 |
| Advanced cooling | Vapor chamber |
| Rear material | Glass |
| Frame material | Plastic |
| Colors | White, Black |
| Fingerprint scanner | Yes, in home button |
Performance
| Chipset | Qualcomm Snapdragon 870 5G |
| Max clock | 3200 MHz |
| CPU cores | 8 (1 + 3 + 4) |
| Architecture | - 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55) - 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77) - 1 core at 3.2 GHz: Kryo 585 Prime (Cortex-A77) |
| L3 cache | 4 MB |
| Lithography process | 7 nanometers |
| Graphics | Adreno 650 |
| GPU clock | 670 MHz |
| FLOPS | ~1372 GFLOPS |
Benchmarks
| CPU | 197488 |
| GPU | 242243 |
| Memory | 106088 |
| UX | 150139 |
| Total score | 693717 |
| Stability | 92% |
| Graphics test | 25 FPS |
| Graphics score | 4282 |
| Web score | 9748 |
| Video editing | 7085 |
| Photo editing | 30295 |
| Data manipulation | 9337 |
| Writing score | 14976 |
AnTuTu Benchmark Android Smartphone Scores - 197th place
Memory
| RAM size | 6, 8, 12 GB |
| Memory type | LPDDR5 |
| Memory clock | 2750 MHz |
| Channels | 4 |
| Storage size | 128, 256 GB |
| Storage type | UFS 3.1 |
| Memory card | No |
Software
| Operating system | Android 11 |
| ROM | MIUI 12.5 Enhanced |
Battery
| Capacity | 4520 mAh |
| Max charge power | 33 W |
| Battery type | Li-Po |
| Replaceable | No |
| Wireless charging | No |
| Reverse charging | No |
| Fast charging | Yes (70% in 30 min) |
| Full charging time | 0:52 hr |
Camera
| Matrix | 48 megapixels |
| Image resolution | 8000 x 6000 |
| Zoom | Digital |
| Flash | LED |
| Stabilization | Digital |
| 8K video recording | No |
| 4K video recording | Up to 30FPS |
| 1080p video recording | Up to 60FPS |
| Slow motion | 960 FPS (720p) |
| Angle of widest lens | 119° |
| Lenses | 3 (48 MP + 8 MP + 5 MP) |
| Wide (main) lens | - 48 MP - Aperture: f/1.8 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/2.0" (CMOS) - Phase autofocus |
| Ultra-wide lens | - 8 MP - Aperture: f/2.2 - Pixel size: 1.12 micron - Sensor: 1/4.0" (CMOS) |
| Macro lens | - 5 MP - Aperture: f/2.4 - Focal length: 50 mm - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS) |
| Camera features | - Bokeh mode - Pro mode |
| Megapixels | 20 megapixels |
| Image resolution | 4608 x 3456 |
| Aperture | f/2.5 |
| Focal length | 26 mm |
| Pixel size | 0.8 microns |
| Sensor type | CMOS |
| Sensor size | 1/3.4" |
| Video resolution | 1080p (Full HD) at 30 FPS |
Connectivity
| Wi-Fi standard | Wi-Fi 6E (802.11 a/b/g/n/ac/ax) |
| Wi-Fi features | - Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5.1 |
| Bluetooth features | LE, HID, A2DP |
| USB type | USB Type-C |
| USB version | 2 |
| USB features | - Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou, Galileo, NAVIC |
| NFC* | Yes |
| Infrared port | Yes |
| Number of SIM* | 2 |
| Type of SIM card | Nano |
| Multi SIM mode | Standby |
| eSIM support* | No |
| Hybrid slot | No |
| LTE Cat* | 20 |
| 5G support | Yes |
Sound
| Speakers | Stereo |
| Headphone audio jack | No |
| FM radio | No |
| Dolby Atmos | Yes |
Other
| Category | Flagship |
| Announced | February 2021 |
| Release date | March 2021 |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! Some specifications of the Redmi K40 may differ by country or region
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